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From:   Ben Dooks <ben.dooks@codethink.co.uk>
To:     netdev@vger.kernel.org
Cc:     oneukum@suse.com, davem@davemloft.net, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-kernel@lists.codethink.co.uk,
        Ben Dooks <ben.dooks@codethink.co.uk>
Subject: [PATCH 4/4] usbnet: smsc95xx: fix rx packet alignment
Date:   Tue,  2 Oct 2018 10:26:45 +0100
Message-Id: <20181002092645.1115-5-ben.dooks@codethink.co.uk>
In-Reply-To: <20181002092645.1115-1-ben.dooks@codethink.co.uk>
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The smsc95xx driver already takes into account the NET_IP_ALIGN
parameter when setting up the receive packet data, which means
we do not need to worry about aligning the packets in the usbnet
driver.

Adding the EVENT_NO_IP_ALIGN means that the IPv4 header is now
passed to the ip_rcv() routine with the start on an aligned address.

Tested on Raspberry Pi B3.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 drivers/net/usb/smsc95xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 46385a4b8b98..2b867523cd53 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1296,6 +1296,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 		dev->net->features |= NETIF_F_RXCSUM;
 
 	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
+	set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
 
 	smsc95xx_init_mac_address(dev);
 
-- 
2.19.0